It's not about money (well, it's about money, too), but in this case it's about much more. All sorts of tools help you stay on top of spending and stay within budget, but if they aren't easy (and fun) to use, they won't get used. We all know that those doing the spending don't need any more obstacles in their daily lives. Employees have enough work. Travelers do, too – and they also spend the majority of their time waiting in line somewhere.